drivers/crypto/bcm/util.h

   1 /*
   2  * Copyright 2016 Broadcom
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License, version 2, as
   6  * published by the Free Software Foundation (the "GPL").
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License version 2 (GPLv2) for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * version 2 (GPLv2) along with this source code.
  15  */
  16
  17 #ifndef _UTIL_H
  18 #define _UTIL_H
  19
  20 #include <linux/kernel.h>
  21 #include <linux/delay.h>
  22
  23 #include "spu.h"
  24
  25 extern int flow_debug_logging;
  26 extern int packet_debug_logging;
  27 extern int debug_logging_sleep;
  28
  29 #ifdef DEBUG
  30 #define flow_log(...)                   \
  31         do {                                  \
  32                 if (flow_debug_logging) {               \
  33                         printk(__VA_ARGS__);              \
  34                         if (debug_logging_sleep)              \
  35                                 msleep(debug_logging_sleep);    \
  36                 }                                       \
  37         } while (0)
  38 #define flow_dump(msg, var, var_len)       \
  39         do {                                     \
  40                 if (flow_debug_logging) {                  \
  41                         print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE,  \
  42                                         16, 1, var, var_len, false); \
  43                                 if (debug_logging_sleep)               \
  44                                         msleep(debug_logging_sleep);   \
  45                 }                                    \
  46         } while (0)
  47
  48 #define packet_log(...)               \
  49         do {                                \
  50                 if (packet_debug_logging) {       \
  51                         printk(__VA_ARGS__);            \
  52                         if (debug_logging_sleep)        \
  53                                 msleep(debug_logging_sleep);  \
  54                 }                                 \
  55         } while (0)
  56 #define packet_dump(msg, var, var_len)   \
  57         do {                                   \
  58                 if (packet_debug_logging) {          \
  59                         print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE,  \
  60                                         16, 1, var, var_len, false); \
  61                         if (debug_logging_sleep)           \
  62                                 msleep(debug_logging_sleep);     \
  63                 }                                    \
  64         } while (0)
  65
  66 void __dump_sg(struct scatterlist *sg, unsigned int skip, unsigned int len);
  67
  68 #define dump_sg(sg, skip, len)     __dump_sg(sg, skip, len)
  69
  70 #else /* !DEBUG_ON */
  71
  72 #define flow_log(...) do {} while (0)
  73 #define flow_dump(msg, var, var_len) do {} while (0)
  74 #define packet_log(...) do {} while (0)
  75 #define packet_dump(msg, var, var_len) do {} while (0)
  76
  77 #define dump_sg(sg, skip, len) do {} while (0)
  78
  79 #endif /* DEBUG_ON */
  80
  81 int spu_sg_at_offset(struct scatterlist *sg, unsigned int skip,
  82                      struct scatterlist **sge, unsigned int *sge_offset);
  83
  84 /* Copy sg data, from skip, length len, to dest */
  85 void sg_copy_part_to_buf(struct scatterlist *src, u8 *dest,
  86                          unsigned int len, unsigned int skip);
  87 /* Copy src into scatterlist from offset, length len */
  88 void sg_copy_part_from_buf(struct scatterlist *dest, u8 *src,
  89                            unsigned int len, unsigned int skip);
  90
  91 int spu_sg_count(struct scatterlist *sg_list, unsigned int skip, int nbytes);
  92 u32 spu_msg_sg_add(struct scatterlist **to_sg,
  93                    struct scatterlist **from_sg, u32 *skip,
  94                    u8 from_nents, u32 tot_len);
  95
  96 void add_to_ctr(u8 *ctr_pos, unsigned int increment);
  97
  98 /* do a synchronous decrypt operation */
  99 int do_decrypt(char *alg_name,
 100                void *key_ptr, unsigned int key_len,
 101                void *iv_ptr, void *src_ptr, void *dst_ptr,
 102                unsigned int block_len);
 103
 104 /* produce a message digest from data of length n bytes */
 105 int do_shash(unsigned char *name, unsigned char *result,
 106              const u8 *data1, unsigned int data1_len,
 107              const u8 *data2, unsigned int data2_len,
 108              const u8 *key, unsigned int key_len);
 109
 110 char *spu_alg_name(enum spu_cipher_alg alg, enum spu_cipher_mode mode);
 111
 112 void spu_setup_debugfs(void);
 113 void spu_free_debugfs(void);
 114 void format_value_ccm(unsigned int val, u8 *buf, u8 len);
 115
 116 #endif